PLEASE NOTE ALL IMAGES UNDER EMBARGO UNTIL FRIDAY 8 MARCH AT 23:00. London, UK. 8th Mar 2019.  Bridget Riley, Songbird, estimate £400,000-600,000 at Christie's exhibition of art from the collection of the late George Michael, featuring works by Damien Hirst, Tracey Emin and Marc Quinn, from its upcoming The George Michael Collection Evening and Online Auctions, on view to the public from 9-15 March 2019. Credit: Nils Jorgensen/Alamy Live News - Stock Photo
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